Exercises: Solve Quadratic Equations with Complex Solutions

Show all steps. Write complex solutions in $a + bi$ form. Include both solutions.

Grade 9·20 problems·~40 min·Common Core Math - HS Number and Quantity·standard·hsn-cn-c-7

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Warm-Up: Review What You Know

The quadratic formula is $x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}$ .

For $x^2 - 6x + 9 = 0$ , what is the discriminant $b^2 - 4ac$ ?

$0$

$-9$

$45$

$72$